Only the wider lenses are a lot larger. My 300/4 for the 6x7 appears to be abut the same size as the 35mm version. I think the 600s are even closer. Paul On Sep 2, 2006, at 11:51 AM, Jostein Øksne wrote:
> Then tell me, guys, > Why are the medium format optics so much larger for corresponding > focal lengths and max apertures? > > Jostein > > On 9/2/06, K.Takeshita <[EMAIL PROTECTED]> wrote: >> Adam Maas mykroft at mykroft.com Sat Sep 2 08:49:28 EST 2006 >> >>>> 400/4 with SSM would be neat. Can't see any good reason to make it >>>> DFA, though. DA will make it smaller, cheaper and just as good. >>>> >>>> >>>> Jostein >>>> >> >>> Actually, the size constraints on a 400 are all in the glass >>> diameter >>> (for a given aperture), format is essentially irrelevant to this, at >>> least until you start talking LF, so there's zero reason to make >>> it a DA >>> lens since it will be the same size anyways. >> >> Exactly. After certain size (say 200mm or so), there is no reason >> to make >> it a DA. >> Still some hope for FF wishers :-). >> >> Cheers, >> >> Ken >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
